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Finding the Fourth Proportional to 98,704, 136,212.60 and 53,992

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Solution

The fourth proportional to 98,704, 136,212.60 and 53,992 is: 74,509.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,704 : 136,212.60 = 53,992 : x
  2. Step 2: Convert to fraction form
    98,704/136,212.60 = 53,992/x
  3. Step 3: Cross multiply
    98,704x = 136,212.60 × 53,992
  4. Step 4: Simplify right side
    98,704x = 7,354,390,699.20
  5. Step 5: Solve for x
    x = 7,354,390,699.20/98,704
  6. Step 6: Final answer
    x = 74,509.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.